Fig. B.2.
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[OIII]88μm/[NII]122μm line ratio as a function of metallicity for three gas densities, nH = 10 (circle), 100 (square), or 1000 (triangle) cm−3, and different values of the ionization parameter, logU betwen -4.0 and -1.0 (with increasing size of the symbols), for fcov = 0. The shaded region corresponds to the values spanned by this ratio in our samples.
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